CN217879958U - Light source device and projection system - Google Patents

Abstract

The utility model discloses a light source device and projection system, including LED light source subassembly, laser light source subassembly and first closed light subassembly. The first light combination component comprises a reflection area and a through hole, the reflection area is used for reflecting the emergent light of the LED light source component to the set direction, and the through hole is used for transmitting the emergent light of the laser light source component to the set direction. The light source device is improved on the basis of not changing the structure of the LED light source component, and the light-emitting brightness of the light source device is increased; the laser light source has a larger color gamut, and the color expression capability can be effectively enhanced and the color gamut can be improved by adding the laser light source component in the light source device and adjusting the proportion of the laser light source to the LED light source; at present, the volume and the energy consumption of common laser light sources are smaller than those of corresponding LED light sources, so that the volume and the energy consumption of a light source device cannot be excessively increased by combining the LED light source assembly and the laser light source assembly.

Description

Light source device and projection system

Technical Field

The utility model relates to a projection display technology field especially relates to a light source device and projection system.

Background

Projection display is a technique in which a light source is controlled by plane image information, and an image is enlarged and displayed on a projection screen using an optical system and a projection space. With the development of projection display technology, projection display is gradually applied to the fields of business activities, conference exhibition, scientific education, military command, traffic management, centralized monitoring, advertising and entertainment and the like, and the advantages of large display screen size, clear display and the like are also suitable for the requirement of large-screen display.

The Light Emitting Diode (LED) has the advantages of fast response, low power consumption, long service life and the like, and the application of the LED to a projection system can change the complex optical path structure of the original Light source; and the LED light source has small volume, thereby being beneficial to the miniaturization and lightweight design of the projection system.

However, the current LED light source projection system still has a problem of low brightness due to the loss of light energy in the projection process, and cannot further improve the color of the color picture and increase the color gamut.

SUMMERY OF THE UTILITY MODEL

In some embodiments of the present invention, the light source device includes: LED light source subassembly, laser light source subassembly and first light subassembly that closes. The first light combination component combines three-color light emitted by the LED light source component and laser emitted by the laser light source component. The first light combination assembly comprises a reflection area and a through hole, the reflection area is used for reflecting the emergent light of the LED light source assembly to the set direction, the through hole is used for transmitting the emergent light of the laser light source assembly to the set direction, and therefore the laser light emitted by the three-color light emitted by the LED light source assembly and the laser light emitted by the laser light source assembly are combined. The brightness of the laser light source component is larger than that of the LED light source component, the laser light source component is added in the light source device, monochromatic light emitted by the laser light source component is combined with three-color light emitted by the LED light source component, the light source device can be improved on the basis of not changing the structure of the LED light source component, and the light emitting brightness of the light source device is increased; the laser light source has a larger color gamut, and the color expression capability can be effectively enhanced and the color gamut can be improved by adding the laser light source component in the light source device and adjusting the proportion of the laser light source to the LED light source; at present, the size and the energy consumption of common laser light sources are smaller than those of corresponding LED light sources, so that the size and the energy consumption of a light source device cannot be excessively increased by combining the LED light source assembly with the laser light source assembly.

In some embodiments, the LED light source assembly includes: the LED light source comprises a first LED light source, a second LED light source, a third LED light source and a second light combination component. The second light combination component is positioned at the intersection of the emergent light of each LED light source, and can combine the light of different colors emitted by each LED light source into white light to be emitted to the first light combination component.

In some embodiments of the present invention, the LED light source assembly further comprises: and the fourth LED light source is used for irradiating and exciting the second LED light source to emit light with a second wave band. The fourth LED light source emits light of a third wave band to the second LED light source through the second light combining component, so that fluorescent powder in the second LED light source is excited to increase emission of light of the second wave band.

The utility model discloses in some embodiments, laser light source subassembly includes at least one laser light source, the light of the first wave band of laser light source outgoing, and the colour of laser light source and first LED light source outgoing light is the same.

In some embodiments of the present invention, in order to improve the laser intensity, two or more laser sources may be disposed in the laser source assembly. The laser light source can adopt a laser chip or a laser. And a converging lens group is arranged on the light emitting side of each laser light source to converge the laser emitted by each laser light source, so that the emergent light of each laser light source is combined into one laser spot.

The utility model discloses in some embodiments, first LED light source adopts ruddiness LED, and the second LED light source adopts green glow LED, and third LED light source and fourth LED light source adopt blue light LED. The laser light source adopts a red light laser chip or a red light laser.

The utility model discloses in some embodiments, the second closes the optical assembly and includes: a first light-combining mirror and a second light-combining mirror. The first light combining mirror is located at the intersection of the emergent light of the first LED light source and the emergent light of the third LED light source, and the first light combining mirror is used for transmitting the light of the third wave band and reflecting the light of the first wave band. The second light combining mirror is positioned at the intersection of the emergent light of the first light combining mirror and the emergent light of the second LED light source and the intersection of the emergent light of the second LED light source and the emergent light of the fourth LED light source, and the second light combining mirror is used for transmitting the light of the second wave band and reflecting the light of the first wave band and the light of the third wave band. The first light-combining mirror and the second light-combining mirror can adopt dichroic mirrors.

In some embodiments of the present invention, the first light combining component adopts a reflector, and the reflector includes a through hole. The reflector is used for reflecting the light of the first wave band, the light of the second wave band and the light of the third wave band, and the through hole is used for transmitting laser. The reflector has higher reflectivity to the three-color light of LED light source subassembly outgoing, and laser has higher collimation degree, and the facula size is less, sets up on the reflector and can transmit laser through to reach the purpose that LED three-color light closed light with laser.

The utility model discloses in some embodiments, the through-hole is located the central point of speculum, and the central point of speculum and the line of the central point of second closed light mirror are on a parallel with the light outgoing direction of second LED light source. The laser facula that the laser light source subassembly was sent out to the speculum is symmetrical about the central point of speculum, and the facula that LED light source subassembly was sent out on the speculum is symmetrical for the central point of speculum. Therefore, the laser spot is positioned in the center of the light combining spot, so that the energy distribution of the light combining spot is more uniform.

The utility model discloses in some embodiments, because the through-hole can transmit the emergent light of partly LED light source subassembly, cause light loss, consequently set the size of through-hole as little as possible to can make the area of through-hole be less than or equal to 1/10 of the emergent facula area of LED light source subassembly through the laser facula for the energy loss control of the LED light source subassembly emergent light of being passed through the through-hole is below 10%. Since the laser light has a large energy with respect to the light emitted from the LED, the light loss can be compensated.

In some embodiments of the present invention, the LED light source assembly further comprises: the lens comprises a first collimating lens group, a second collimating lens group, a third collimating lens group and a fourth collimating lens group. The first collimating lens group is positioned on the light-emitting side of the first LED light source; the second collimating lens group is positioned on the light-emitting side of the second LED light source; the third collimating lens group is positioned on the light-emitting side of the third LED light source; the fourth collimating lens group is positioned at the light-emitting side of the fourth LED light source. Because the emergent light of the LED light sources meets Lambert distribution and has a larger divergence angle, the collimating lens group is arranged on the light-emitting side of each LED light source to collimate the emergent light of the LED light sources and then emit the collimated emergent light.

In some embodiments, the LED light source assembly further comprises: and a beam shrinking lens group. The beam-shrinking lens group is positioned between the first light-combining lens and the second light-combining lens. Because the optical paths of the emergent lights of the LED light sources before being combined are different, and the emergent light of the LED light sources has a certain divergence angle, the light path of the first LED light source and the third LED light source before being incident on the second light combining mirror is longer relative to the light path of the second LED light source before being incident on the second light combining mirror, and the light spot size after being dispersed is larger as the light path is longer, the combined light of the first LED light source and the third LED light source needs to be condensed by the beam condensing lens group before being incident on the second light combining mirror, so that the light spot size of the combined light of the first LED light source and the third LED light source is the same as possible as the light spot size of the second LED light source.

In some embodiments, the LED light source assembly further comprises: and the first light homogenizing part is positioned on the light emergent side of the second light combining mirror. Correspondingly, the laser light source assembly further comprises: and the second dodging component is positioned on the light outlet side of the converging lens group. Even light parts are respectively arranged aiming at the light paths of the LED light source component and the laser light source component, the structure of the LED light source component is not required to be changed, and emergent light of the two light source components is uniform light beams. The first dodging component adopts a compound eye lens group, and the second dodging component can adopt a light guide pipe, a light bar and the like.

In some embodiments of the present invention, the laser light source assembly further comprises: and the fifth collimating lens group is positioned on the light-emitting side of the second dodging component. The emergent laser of laser light source subassembly need close light through the through-hole of speculum and the emergent light of LED light source subassembly, and in order to make the final emergent facula of laser light source subassembly little enough, the light-emitting side at the even light part of second sets up the further collimation of laser beam after the homogenization of fifth collimating lens group to the laser beam who makes the final emergent of laser light source subassembly can pass the through-hole as much as possible and be utilized.

In some embodiments of the present invention, the projection system includes any one of the above-mentioned light source devices, an illumination light path, a light valve modulation component and a projection lens. The illumination light path is located on the light emitting side of the light source device, the light valve modulation component is located on the light emitting side of the illumination light path, and the projection lens is located on the reflection light path of the light valve modulation component. The projection system can obtain the required image quality after enhancing the color, the color gamut and the brightness by controlling the color ratio of the laser light source and the LED light source.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of a light source device in the related art;

fig. 2 is a schematic structural diagram of a light source device according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of an LED light source assembly according to an embodiment of the present invention;

fig. 4 is a second schematic structural diagram of a light source device according to an embodiment of the present invention;

fig. 5 is a third schematic structural view of a light source device according to an embodiment of the present invention;

fig. 6 is a fourth schematic structural view of a light source device according to an embodiment of the present invention;

fig. 7 is a fifth schematic structural view of a light source device according to an embodiment of the present invention;

fig. 8 is a sixth schematic structural view of a light source device according to an embodiment of the present invention;

fig. 9 is a seventh schematic structural diagram of a light source device according to an embodiment of the present invention;

fig. 10 is an eighth schematic structural view of a light source device according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a projection system according to an embodiment of the present invention.

The LED illumination system comprises an S1-LED light source component, an S2-laser light source component, an S3-first light combination component, a 2-second light combination component, an 11-first LED light source, a 12-second LED light source, a 13-third LED light source, a 14-fourth LED light source, an L-laser light source, a 21-first light combination mirror, a 22-second light combination mirror, a 31-first collimating lens group, a 32-second collimating lens group, a 33-third collimating lens group, a 34-fourth collimating lens group, a 35-converging lens group, an h-through hole, an f-reflecting region, a 4-converging lens group, a 51-first light homogenizing component, a 52-second light homogenizing component, a 6-fifth collimating lens group, a 100-light source device, a 200-illumination light path, a 300-light valve modulation component and a 400-projection lens.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described with reference to the accompanying drawings and examples. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus, a repetitive description thereof will be omitted. The words for expressing the position and direction described in the present invention are all the explanations given by taking the drawings as examples, but can be changed according to the needs, and the changes are all included in the protection scope of the present invention. The drawings of the present invention are only for illustrating the relative positional relationship and do not represent a true scale.

Projection display is a technique in which a light source is controlled by plane image information, and an image is enlarged and displayed on a projection screen using an optical system and a projection space.

Projection light sources, which are important components in projection systems, determine the display brightness and gamut range. The Light Emitting Diode (LED for short) has the advantages of fast response, low power consumption, long service life and the like, and the complex Light path structure of the original Light source can be changed by using the LED as the Light source of the projection system; and the LED light source has small volume, thereby being beneficial to the miniaturization and lightweight design of the projection system.

In order to realize a full-color display, a light source device is generally required to be provided with a light source capable of emitting light of three primary colors, and in a light source device having LEDs as light sources, a first LED light source for emitting red light, a second LED light source for emitting green light, and a third LED light source for emitting blue light may be provided at the same time.

Fig. 1 is a schematic structural diagram of a light source device in the related art.

As shown in fig. 1, the red light a emitted from the first LED light source 11, the green light b emitted from the second LED light source 12, and the blue light c emitted from the third LED light source 13 are combined and emitted. Thereby enabling the projection light source to emit tricolor light.

However, due to the loss of light energy in the projection process, the current projection system using the LED light source still has the problem of low brightness, and due to the limited color gamut of the LED, the color of the color picture cannot be further improved, and the color gamut cannot be increased.

Therefore, the embodiment of the utility model provides an increased laser source on LED light source system's basis for improve light source device's luminance, be favorable to further promoting the colour gamut scope, optimize projection system's color performance ability.

Fig. 2 is a schematic structural diagram of a light source device according to an embodiment of the present invention.

As shown in fig. 2, an embodiment of the present invention provides a light source device including: LED light source subassembly S1, laser light source subassembly S2 and first light assembly S3 that closes.

Wherein, LED light source subassembly S1 includes at least: a first LED light source 11, a second LED light source 12 and a third LED light source 13. The first LED light source 11 emits light of a first wavelength band, the second LED light source 12 emits light of a second wavelength band, and the third LED light source 13 emits light of a third wavelength band. The embodiment of the present invention provides a light of the first wavelength band can be red light, a light of the second wavelength band can be green light, and a light of the third wavelength band can be blue light, which is not limited herein.

The laser light source assembly S2 includes at least one laser light source L, and the laser light source L emits laser light of a first wavelength band. The half-peak width of the laser is narrow and has a high energy at the peak wavelength, while the LED light source emits light with a small energy and covers a wide wavelength band compared to the laser light source. In the embodiment of the present invention, the first LED light source 11 emits light with the same color as the laser light source L, and the laser light source L emits laser light with red color.

The first light combination assembly S3 is located at the intersection of the emergent light of the LED light source assembly S1 and the emergent light of the laser light source assembly S2, and the first light combination assembly S3 is used for reflecting the emergent light of the LED light source assembly S1 and transmitting the emergent light of the laser light source assembly S2.

The embodiment of the utility model provides a light source device includes two kinds of light source subassemblies, LED light source subassembly and laser light source subassembly respectively, and the luminance of laser light source subassembly is bigger than LED light source subassembly, increases laser light source subassembly in light source device to the monochromatic light that emits laser light source subassembly and the three-color light that LED light source subassembly emitted combine light, can improve light source device on the basis that does not change LED light source subassembly structure, increases light-emitting luminance of light source device; the laser light source has a larger color gamut, and the color expression capability can be effectively enhanced and the color gamut can be improved by adding the laser light source component in the light source device and adjusting the proportion of the laser light source to the LED light source; at present, the volume and the energy consumption of common laser light sources are smaller than those of corresponding LED light sources, so that the volume and the energy consumption of a light source device cannot be excessively increased by combining the LED light source assembly and the laser light source assembly.

Specifically, as shown in fig. 2, a second light combining component 2 is disposed in the LED light source assembly, and the second light combining component 2 is located at a junction of the light emitted from each LED light source, so that the light emitted from each LED light source with different colors can be combined into white light and emitted to the first light combining component S3.

In specific implementation, the first LED light source 11 is a red LED, the second LED light source 12 is a green LED, and the third LED light source 13 is a blue LED. The laser light source L is a red laser chip or a red laser, and is not limited herein.

The green LED has low brightness, and the green LED is internally provided with green fluorescent powder, and the blue LED chip is adopted to excite the green fluorescent powder to emit green light. In order to improve the brightness of the green light, a blue light source can be added for emitting and irradiating the green fluorescent powder to excite the green fluorescent powder, and the stimulated emission times of the green fluorescent powder in the green light LED can be increased to enhance the intensity of the green light.

Fig. 3 is a schematic structural diagram of an LED light source assembly according to an embodiment of the present invention.

In some embodiments, as shown in fig. 3, the LED light source assembly further comprises: a fourth LED light source 14. The fourth LED light source 14 emits light of a third wavelength band, and the fourth LED light source is configured to illuminate light that excites the second LED light source 12 to emit light of a second wavelength band.

The fourth LED light source 14 can emit light of a third wavelength band to the second LED light source 12 through the second light combining component 2, so as to excite the phosphor in the second LED light source 12 to increase the emission of light of the second wavelength band. In an embodiment of the present invention, the light of the second wavelength band may be green light, and the light of the third wavelength band may be blue light; the second LED light sources 12 may be green LEDs and the fourth LED light sources 14 may be blue LEDs. Thereby, the green light brightness of the light source device can be increased.

Fig. 4 is a second schematic structural diagram of a light source device according to an embodiment of the present invention.

As shown in fig. 4, the second light combining component includes: a first light combining mirror 21 and a second light combining mirror 22; the first LED light source 11 and the second LED light source 12 are arranged in parallel, the first LED light source 11 and the third LED light source 13 are arranged vertically, and the second LED light source 12 and the fourth LED light source 14 are arranged vertically.

The first light combining mirror 21 is located at a junction of the emergent light of the first LED light source 11 and the emergent light of the third LED light source 13, and the first light combining mirror 21 is configured to transmit the light c of the third wavelength band and reflect the light a of the first wavelength band.

The second light combining mirror 22 is located at a junction between the emergent light of the first light combining mirror 21 and the emergent light of the second LED light source 12 and a junction between the emergent light of the second LED light source 12 and the emergent light of the fourth LED light source 14, and the second light combining mirror 22 is configured to transmit the light b of the second wavelength band and reflect the light a of the first wavelength band and the light c of the third wavelength band.

In the embodiment of the present invention, the light a of the first wavelength band is red light, the light b of the second wavelength band is green light, and the light c of the third wavelength band is blue light. The first light-combining mirror 21 and the second light-combining mirror 22 can both adopt dichroic mirrors, the dichroic mirrors are formed by coating films on the surfaces of transparent flat plates by utilizing the thin film interference principle, and light with different wave bands can be reflected or increased according to the required anti-reflection.

Specifically, as shown in fig. 4, the first light combiner 21 is used to transmit blue light and reflect red light. The blue light (c) emitted from the third LED light source 13 enters the first combiner 21 and is transmitted by the first combiner 21 in the direction of the second combiner 22; red light (a) emitted from the first LED light source 11 enters the first light combining mirror 21 and is reflected by the first light combining mirror 21 in the direction of the second light combining mirror 22; thereby combining the blue light (c) and the red light (a).

The second combiner 22 is arranged to transmit green light and reflect blue and red light. The blue light (c) and the red light (a) emitted from the first combiner 21 enter the second combiner 22 and are reflected in the set direction by the second combiner 22; blue light (c) emitted from the fourth LED light source 14 enters the second light combiner 22 and is reflected by the second light combiner 22 in the direction of the second LED light source 12; the blue light (c) emitted from the fourth LED light source 14 excites the green light (b) emitted from the phosphor in the second LED light source 12 and the green light (b) emitted from the second LED light source 12 to enter the second combiner 22, and is transmitted in the set direction by the second combiner 22; thereby, the red light (a), the green light (b), and the blue light (c) are combined into white light and emitted in a predetermined direction.

It should be noted that, in the embodiment of the present invention, the light emitting direction of each LED light source is parallel or perpendicular, and therefore, any light combining mirror in the second light combining component needs to keep an included angle of 45 ° with the incident light. When the LED light source is incident to any light combining mirror in the light combining component, the LED light source is incident to the central position of the light combining mirror, so that the centers of light spots incident to the light combining mirror are overlapped, and the energy distribution of the light combining light spots is more uniform.

Fig. 5 is a third schematic structural diagram of a light source device according to an embodiment of the present invention.

At least one laser light source L is disposed in the laser light source module S2, and in order to increase the laser intensity, as shown in fig. 5, two or more laser light sources L may be disposed in the laser light source module S2. The laser light source L may employ a laser chip or a laser. The embodiment of the utility model provides an in, laser lamp-house subassembly S2 can include that two set up laser source L side by side, and this laser source can be red laser instrument.

In a specific implementation, a converging lens group 35 may be disposed on the light emitting side of each laser light source L to converge the laser light emitted from each laser light source L, so that the emitted light from each laser light source L is combined into one laser spot.

In the embodiment of the present invention, the converging lens group 35 includes at least one lens, and when only one lens is adopted, the lens may be a convex lens, which is not limited herein.

The light combining principle of the LED light source module S1 and the laser light source module S2 is specifically described below. Fig. 6 is a fourth schematic structural view of a light source device according to an embodiment of the present invention.

As shown in fig. 6, the first light combining component S3 includes a reflection area f and a through hole h. The reflecting area f is used for reflecting the emergent light of the LED light source component S1 to a set direction; the through hole h is used for transmitting the emergent light of the laser light source component S2 to the set direction. Taking fig. 6 as an example, the direction is set to be the horizontal rightward direction, and the first light combining unit S3 is used to combine the light emitted from the LED light source unit S1 and the light emitted from the laser light source unit S2 in the same direction.

Specifically, the first light combining component S3 adopts a reflector, and the reflector includes a through hole h. The reflector is used for reflecting the light a of the first waveband, the light b of the second waveband and the light c of the third waveband, and the through hole h is used for transmitting the laser d.

The embodiment of the utility model provides an in first closed light subassembly S3 adopts to have the speculum through h, and not dichroic mirror, this because first closed light subassembly S3 needs the light a of reflection first wave band, the light b of second wave band and the light c of third wave band simultaneously, need transmit the laser d of first wave band simultaneously, adopts dichroic mirror can't accomplish simultaneously reflection and the light of transmitting same wave band. Therefore, the reflector with the through hole is adopted, on one hand, the three-color light emitted by the LED light source assembly S1 has high reflectivity, on the other hand, the laser has high collimation degree, the light spot size is small, and the reflector is provided with the light-transmitting laser through the light-transmitting laser, so that the purpose of combining the three-color light of the LED and the laser is achieved.

In the embodiment of the present invention, as shown in fig. 6, the through hole h is located at the center of the reflector, and the connection line between the center point of the reflector and the center point of the second light combining mirror 22 is parallel to the light emitting direction of the second LED light source 12. The laser facula emitted to the reflector from the laser light source component S2 is symmetrical about the central point of the reflector, and the facula emitted to the reflector from the LED light source component S1 is symmetrical relative to the central point of the reflector. Therefore, the laser spot is positioned in the center of the light combining spot, so that the energy distribution of the light combining spot is more uniform.

Because through-hole h can transmit some LED light source subassembly S1 'S emergent light, cause light loss, consequently the embodiment of the utility model provides an in, set through-hole h' S size as little as possible to can be accurate through the laser facula, make through-hole h 'S area be less than or equal to LED light source subassembly S1' S emergent facula area 1/10, thereby make the energy loss control of the LED light source subassembly S1 emergent light of being transmitted by through-hole h below 10%. Since the laser light has a large energy with respect to the light emitted from the LED, the light loss can be compensated.

Fig. 7 is a fifth schematic structural view of a light source device according to an embodiment of the present invention.

As shown in fig. 7, LED light source assembly S1 further includes: a first collimating lens group 31, a second collimating lens group 32, a third collimating lens group 33, and a fourth collimating lens group 34. Wherein, the first collimating lens group 31 is located at the light emitting side of the first LED light source 11; the second collimating lens group 32 is positioned at the light-emitting side of the second LED light source 12; the third collimating lens group 33 is located at the light emitting side of the third LED light source 13; the fourth collimating lens group 34 is located on the light exit side of the fourth LED light source 14.

Because the emergent light of the LED light sources meets Lambert distribution and has a larger divergence angle, the emergent light of the LED light sources can be collimated and then emitted by arranging the collimating lens groups on the light emitting sides of the LED light sources.

The collimating lens group includes at least one lens, as shown in fig. 7, and in an embodiment of the present invention, the collimating lens group may include two lenses, which is not limited herein.

Fig. 8 is a sixth schematic structural view of a light source device according to an embodiment of the present invention.

As shown in fig. 8, the LED light source assembly S1 further includes: a converging lens group 4. The beam-shrinking lens group 4 is positioned between the first light-combining mirror 21 and the second light-combining mirror 22.

Because the optical paths of the emergent lights of the LED light sources before combining are different, and the emergent lights of the LED light sources have a certain divergence angle, and the light paths of the first LED light source 11 and the third LED light source 13 before entering the second light combining mirror 22 are longer relative to the light path of the second LED light source 12, and the light spot size after the light paths are spread as long as possible is larger, the combined light of the first LED light source 11 and the third LED light source 13 needs to be firstly condensed by the beam condensing lens group 4 before entering the second light combining mirror 22, so that the light spot size of the combined light of the first LED light source 11 and the third LED light source 13 is as same as the light spot size of the second LED light source 12 as possible.

In the embodiment of the present invention, the beam reduction lens group 4 includes at least one lens, and when only one lens is adopted, the lens may be a convex lens, which is not limited herein.

Fig. 9 is a seventh schematic structural diagram of a light source device according to an embodiment of the present invention.

As shown in fig. 9, LED light source assembly S1 further includes: and the first dodging member 51 is positioned at the light emitting side of the second light combining mirror 22, and the first dodging member 51 is positioned at the light emitting side of the second light combining mirror 22. Correspondingly, the laser light source assembly S2 further includes: and a second dodging member 52, the second dodging member 52 being located on a light-emitting side of the condenser lens group 35.

The embodiment of the utility model provides a close the light-emitting side of photoscope 22 at the second and set up first even light part 51, set up the even light part 52 of second in the light-emitting side of convergent lens group 35, can set up even light part respectively to LED light source subassembly S1 and laser light source subassembly S2 'S light path like this, need not change LED light source subassembly S1' S structure, and the emergent light of two kinds of light source subassemblies is even light beam.

In a specific implementation, as shown in fig. 9, the first light uniformizing part 51 may adopt a fly-eye lens group, where the fly-eye lens group includes a first fly-eye lens and a second fly-eye lens which are arranged oppositely, and surfaces of the first fly-eye lens and the second fly-eye lens each include a micro lens unit arranged in an array. The light beams after light combination pass through the first fly-eye lens and are focused to the center of each micro lens unit of the second fly-eye lens, and the second fly-eye lens enables imaging light rays of the first fly-eye lens to be overlapped and imaged on the illumination surface. Thereby effectively improving the uniformity and illumination brightness of the illumination light beam. The second light unifying unit 52 may be a light guide, a light bar, or the like, and is not limited herein.

In addition, the first light homogenizing member 51 and the second light homogenizing member 52 may also adopt other optical elements with light homogenizing function for homogenizing the emergent light of each light source assembly so as to make the energy of the emergent light spot more uniform.

Fig. 10 is an eighth schematic structural view of a light source device according to an embodiment of the present invention.

As shown in fig. 10, the laser light source assembly S2 further includes: and the fifth collimating lens group 6, wherein the fifth collimating lens group 6 is positioned at the light-emitting side of the second dodging component 52.

The emergent laser of laser light source subassembly need close light through the through-hole of speculum and the emergent light of LED light source subassembly, and in order to make the final emergent facula of laser light source subassembly little enough, it sets up the further collimation of the laser beam after the fifth collimating lens group 6 is to the homogenization to incline at the light-emitting of second even light part 52, so that the laser beam of the final emergent of laser light source subassembly can pass through-hole h as much as possible and be utilized.

The fifth collimating lens group 6 includes at least one lens, and in the embodiment of the present invention, the fifth collimating lens group 6 may include two lenses, which is not limited herein.

Fig. 11 is a schematic structural diagram of a projection system according to an embodiment of the present invention.

As shown in fig. 11, the projection system includes any of the light source devices 100 described above, an illumination optical path 200, a light valve modulation section 300, and a projection lens 400. The illumination light path 200 is located on the light emitting side of the light source device 100, the light valve modulation component 300 is located on the light emitting side of the illumination light path 200, and the projection lens 400 is located on the reflection light path of the light valve modulation component 300.

The light source device 100 comprises two light source components, namely an LED light source component and a laser light source component, the brightness of the laser light source component is larger than that of the LED light source component, the laser light source component is added in the light source device, monochromatic light emitted by the laser light source component is combined with three-color light emitted by the LED light source component, the light source device can be improved on the basis of not changing the structure of the LED light source component, and the light emitting brightness of the light source device is increased; the laser light source has a larger color gamut, and the color expression capability can be effectively enhanced and the color gamut can be improved by adding the laser light source component in the light source device and adjusting the proportion of the laser light source to the LED light source; at present, the volume and the energy consumption of common laser light sources are smaller than those of corresponding LED light sources, so that the volume and the energy consumption of a light source device cannot be excessively increased by combining the LED light source assembly and the laser light source assembly.

The illumination optical path 200 is located on the light emitting side of the light source device 100, and the illumination optical path 200 collimates the light emitted from the light source device 100 and allows the light emitted from the light source device 100 to enter the light valve modulating member 300 at an appropriate angle. The illumination path 200 may include a plurality of lenses or lens groups, which are not limited herein.

The light valve modulating unit 300 is used to modulate and reflect the incident light. In an embodiment, the light valve modulating component 300 may employ a Digital Micromirror (DMD). After passing through the illumination optical path 200, the light beam conforms to the illumination size and incident angle required by the DMD. The DMD surface includes thousands of minute mirrors, each of which can be individually driven to deflect, and the reflected light is made incident on the projection lens 400 by controlling the deflection angle of the DMD.

The projection lens 400 is used for imaging the outgoing light of the light valve modulation component 300, and is used for projection imaging after being imaged by the projection lens 400.

The projection system can obtain the required image quality after enhancing the color, the color gamut and the brightness by controlling the color ratio of the laser light source and the LED light source.

According to a first aspect of the invention, a light source device comprises: LED light source subassembly, laser light source subassembly and first light subassembly that closes. The first light combination component combines three-color light emitted by the LED light source component and laser emitted by the laser light source component. The first light combination assembly comprises a reflection area and a through hole, the reflection area is used for reflecting the emergent light of the LED light source assembly to the set direction, the through hole is used for transmitting the emergent light of the laser light source assembly to the set direction, and therefore the laser light emitted by the three-color light emitted by the LED light source assembly and the laser light emitted by the laser light source assembly are combined. The brightness of the laser light source component is larger than that of the LED light source component, the laser light source component is added in the light source device, monochromatic light emitted by the laser light source component and three-color light emitted by the LED light source component are combined, the light source device can be improved on the basis of not changing the structure of the LED light source component, and the light emitting brightness of the light source device is increased; the laser light source has a larger color gamut, and the color expression capability can be effectively enhanced and the color gamut can be improved by adding the laser light source component in the light source device and adjusting the proportion of the laser light source to the LED light source; at present, the volume and the energy consumption of common laser light sources are smaller than those of corresponding LED light sources, so that the volume and the energy consumption of a light source device cannot be excessively increased by combining the LED light source assembly and the laser light source assembly.

According to a second utility model concept, the LED light source assembly includes: the LED light source comprises a first LED light source, a second LED light source, a third LED light source and a second light combination component. The second light combining component is positioned at the intersection of the emergent light of each LED light source, and can combine the light with different colors emitted by each LED light source into white light to be emitted to the first light combining component.

According to a third utility model concept, the LED light source assembly further comprises: and the fourth LED light source is used for irradiating and exciting the second LED light source to emit light with a second wave band. The fourth LED light source emits light of a third wave band to the second LED light source through the second light combining component, so that fluorescent powder in the second LED light source is excited to increase emission of light of the second wave band.

According to the fourth utility model discloses think about, laser light source subassembly includes at least one laser light source, the light of the first wave band of laser light source outgoing, and the colour of laser light source and first LED light source outgoing is the same.

According to a fifth novel concept, in order to increase the laser intensity, two or more laser light sources may be provided in the laser light source module. The laser light source can adopt a laser chip or a laser. And a converging lens group is arranged on the light emitting side of each laser light source to converge the laser emitted by each laser light source, so that the emergent light of each laser light source is combined into one laser spot.

According to the sixth utility model, the first LED light source adopts ruddiness LED, and the second LED light source adopts green glow LED, and third LED light source and fourth LED light source adopt blue light LED. The laser light source adopts a red light laser chip or a red light laser.

According to a seventh utility model, the second light combining component comprises: a first light-combining mirror and a second light-combining mirror. The first light combining mirror is located at the intersection of the emergent light of the first LED light source and the emergent light of the third LED light source, and the first light combining mirror is used for transmitting the light of the third wave band and reflecting the light of the first wave band. The second light combining mirror is positioned at the intersection of the emergent light of the first light combining mirror and the emergent light of the second LED light source and the intersection of the emergent light of the second LED light source and the emergent light of the fourth LED light source, and the second light combining mirror is used for transmitting the light of the second wave band and reflecting the light of the first wave band and the light of the third wave band. The first light-combining mirror and the second light-combining mirror can adopt dichroic mirrors.

According to the eighth utility model, the first light combination component adopts a reflector, and the reflector comprises a through hole. The reflector is used for reflecting the light of the first wave band, the light of the second wave band and the light of the third wave band, and the through hole is used for transmitting the laser. The reflector has higher reflectivity to the three-color light of LED light source subassembly outgoing, and laser has higher collimation degree, and the facula size is less, sets up on the reflector and can transmit laser through to reach the purpose that LED three-color light closed light with laser.

According to the ninth utility model, the through-hole is located the central point of speculum and puts, and the central point of speculum and the line of the central point of second light-combining mirror are on a parallel with the light outgoing direction of second LED light source. The laser facula that the laser light source subassembly was sent out to the speculum is symmetrical about the central point of speculum, and the facula that LED light source subassembly was sent out on the speculum is symmetrical for the central point of speculum. Therefore, the laser spot is positioned in the center of the light combining spot, so that the energy distribution of the light combining spot is more uniform.

According to the tenth utility model discloses think about, because the through-hole can transmit the emergent light of partly LED light source subassembly, cause light loss, consequently set the size of through-hole as little as possible to can make the area of through-hole be less than or equal to 1/10 of the emergent facula area of LED light source subassembly through the laser facula as the standard, thereby make the energy loss control of the emergent light of the LED light source subassembly of being transmitted by the through-hole below 10%. Since the laser light has a large energy with respect to the light emitted from the LED, the light loss can be compensated.

According to the eleventh utility model, the LED light source module further comprises: the lens comprises a first collimating lens group, a second collimating lens group, a third collimating lens group and a fourth collimating lens group. The first collimating lens group is positioned on the light-emitting side of the first LED light source; the second collimating lens group is positioned on the light-emitting side of the second LED light source; the third collimating lens group is positioned on the light-emitting side of the third LED light source; the fourth collimating lens group is positioned at the light-emitting side of the fourth LED light source. Because the emergent light of the LED light sources meets Lambert distribution and has a larger divergence angle, the collimating lens group is arranged on the light-emitting side of each LED light source to collimate the emergent light of the LED light sources and then emit the collimated emergent light.

According to a twelfth utility model concept, the LED light source module further comprises: and a beam shrinking lens group. The beam-shrinking lens group is positioned between the first light-combining lens and the second light-combining lens. Because the optical paths of the emergent light of the LED light sources before the emergent light is combined are different, the emergent light of the LED light sources has a certain divergence angle, the light path of the first LED light source and the light path of the third LED light source are longer relative to the light path of the second LED light source before the emergent light of the second LED light source enters the second light combining mirror, and the size of the light spot after the light path is lengthened and dispersed is larger, the combined light of the first LED light source and the third LED light source needs to be condensed by the beam condensing lens group before the combined light enters the second light combining mirror, so that the size of the combined light spot of the first LED light source and the third LED light source is the same as possible as that of the light spot of the second LED light source.

According to a thirteenth utility model, the LED light source module further includes: and the first dodging component is positioned on the light emergent side of the second light combining mirror. Correspondingly, the laser light source assembly further comprises: and the second dodging component is positioned on the light outlet side of the converging lens group. The light path of the LED light source component and the light path of the laser light source component are respectively provided with the light-homogenizing component, the structure of the LED light source component is not required to be changed, and emergent light of the two light source components is uniform light beams. The first dodging component adopts a compound eye lens group, and the second dodging component can adopt a light guide pipe, a light bar and the like.

According to a fourteenth utility model, the laser light source module further includes: and the fifth collimating lens group is positioned on the light-emitting side of the second dodging component. The emergent laser of laser light source subassembly need close light through the through-hole of speculum and the emergent light of LED light source subassembly, and in order to make the final emergent facula of laser light source subassembly little enough, set up the further collimation of the laser beam after the fifth collimating lens group is homogenized in the light-emitting side of the even light part of second to the laser beam that makes the final emergent of laser light source subassembly can pass the through-hole as far as and be utilized.

According to a fifteenth aspect of the present invention, a projection system includes any one of the light source devices, an illumination light path, a light valve modulation unit, and a projection lens. The light source device comprises a light source device, a light valve modulation component, a projection lens and a light source device, wherein the light path is positioned on the light emitting side of the light source device, the light valve modulation component is positioned on the light emitting side of the light path, and the projection lens is positioned on the reflection light path of the light valve modulation component. The projection system can obtain the required image quality after enhancing the color, the color gamut and the brightness by controlling the color ratio of the laser light source and the LED light source.

While the preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (10)

1. A light source device, comprising:

an LED light source assembly; the LED light source component at least comprises: a first LED light source, a second LED light source and a third LED light source; the first LED light source emits light with a first wave band, the second LED light source emits light with a second wave band, and the third LED light source emits light with a third wave band;

the laser light source component is used for emitting laser of the first wave band;

the first light combination component is positioned at the intersection of the emergent light of the LED light source component and the emergent light of the laser light source component; the first light combination component comprises a reflection area and a through hole; the reflecting area is used for reflecting the emergent light of the LED light source assembly in the set direction, and the through hole is used for transmitting the emergent light of the laser light source assembly in the set direction.

2. The light source device according to claim 1, wherein the LED light source assembly further comprises:

a fourth LED light source; the fourth LED light source emits light of the third wavelength band, and the fourth LED light source is used for irradiating and exciting the second LED light source to emit light of the second wavelength band;

and the second light combining component is positioned at the intersection of the emergent light of each LED light source in the LED light source component and is used for combining the emergent light of each LED light source into light to be emitted to the first light combining component.

3. The light source device of claim 2, wherein the second light combining component comprises: a first light combining mirror and a second light combining mirror;

the first LED light source and the second LED light source are arranged in parallel, the first LED light source and the third LED light source are arranged vertically, and the second LED light source and the fourth LED light source are arranged vertically;

the first light combining mirror is positioned at the intersection of the emergent light of the first LED light source and the emergent light of the third LED light source, and the first light combining mirror is used for transmitting the light of the third wavelength band and reflecting the light of the first wavelength band;

the second light combining mirror is located at the intersection of the emergent light of the first light combining mirror and the emergent light of the second LED light source and the intersection of the emergent light of the second LED light source and the emergent light of the fourth LED light source, and the second light combining mirror is used for transmitting the light of the second wavelength band and reflecting the light of the first wavelength band and the light of the third wavelength band.

4. The light source device according to claim 3, wherein the LED light source module further comprises:

the first collimating lens group is positioned on the light emitting side of the first LED light source;

the second collimating lens group is positioned on the light emitting side of the second LED light source;

the third collimating lens group is positioned on the light emitting side of the third LED light source;

the fourth collimating lens group is positioned on the light emitting side of the fourth LED light source;

the beam-shrinking lens group is positioned between the first light-combining lens and the second light-combining lens;

the first dodging component is positioned on the light emitting side of the second light combining mirror; the first dodging component is a compound eye lens group.

5. The light source device according to claim 1, wherein the laser light source assembly includes:

at least one laser light source for emitting laser light of the first wavelength band;

the converging lens group is positioned on the light-emitting side of the laser light source;

the second dodging component is positioned on the light emitting side of the converging lens group; the second light homogenizing part is a light guide pipe or a light bar;

and the fifth collimating lens group is positioned on the light-emitting side of the second dodging component.

6. The light source device according to claim 5, wherein the first light combining component is a reflector, the reflector comprising a through hole; the reflector is used for reflecting the light of the first wave band, the second wave band and the third wave band, and the through hole is used for transmitting laser.

7. The light source device according to claim 6, wherein the through hole is located at a center of the reflector, and an area of the through hole is less than or equal to 1/10 of an area of an exit spot of the LED light source assembly.

8. The light source device according to claim 2, wherein the light of the first wavelength band is red light, the light of the second wavelength band is green light, and the light of the third wavelength band is blue light;

the first LED light source is a red LED, the second LED light source is a green LED, and the third LED light source and the fourth LED light source are blue LEDs.

9. The light source device according to claim 5, wherein the laser light source is a red laser chip or a red laser.

10. A projection system comprising the light source device according to any one of claims 1 to 9, an illumination light path, a light valve modulation member, and a projection lens;

the illumination light path is positioned on the light emitting side of the light source device, the light valve modulation component is positioned on the light emitting side of the illumination light path, and the light valve modulation component is used for modulating and reflecting incident light; the projection lens is positioned on a reflection light path of the light valve modulation component and is used for imaging emergent light of the light valve modulation component.

Images